Mr. Ebert was my favorite critic. I estimate that I've read over 500 of his reviews, and I watched his show back when he & Siskel were on it together. He was a titan to me, the best critic I've ever read. His knowledge of film was nearly unparallelled, and his passion and enthusiasm was contagious. I didn't always agree with his opinions on a film but I read enough of his material to understand from his opinion what I would probably think. That made his reviews valuable to me.
He'll be greatly missed. I don't see anyone else out there that can take his place. RIP, Mr. Ebert!